package example05;
class Student{
    public Student(){
        System.out.println("调用了无参构造法");
        }
    }
    public class example05{
        public static void main(String[] args){
            System.out.println("声明对象...");
            Student stu = null;
            System.out.println("实例化对象...");
            stu = new Student();
        }
    }